add theming via css custom properties

and a bonus dark color theme toggle

4 files changed, 70 insertions, 22 deletions

diff --git a/client/src/sass/application.scss b/client/src/sass/application.scss
index a4fea13c2..b92036de7 100644
--- a/client/src/sass/application.scss
+++ b/client/src/sass/application.scss
@@ -21,7 +21,7 @@ $assets-path: '../assets/';
 body {
   font-family: $main-fonts;
   font-weight: $font-regular;
-  color: #000;
+  color: var(--mainForegroundColor);
   font-size: 14px;
 }
 
@@ -83,7 +83,7 @@ label {
   }
 
   .sub-menu {
-    background-color: #F7F7F7;
+    background-color: var(--submenuColor);
     width: 100%;
     height: 81px;
     margin-bottom: 30px;
@@ -110,7 +110,7 @@ label {
 }
 
 .title-page {
-  color: #000;
+  color: var(--mainForegroundColor);
   font-size: 16px;
   display: inline-block;
   margin-right: 55px;
@@ -118,14 +118,14 @@ label {
   @include disable-default-a-behaviour;
 
   &.active, &.title-page-single {
-    border-bottom: 2px solid $orange-color;
+    border-bottom: 2px solid var(--mainColor);
     font-weight: $font-bold;
     margin-top: 30px;
     margin-bottom: 25px;
   }
 
   &:hover, &:active, &:focus {
-    color: #000;
+    color: var(--mainForegroundColor);
   }
 
   @media screen and (max-width: 500px) {
@@ -146,13 +146,14 @@ label {
     @include disable-default-a-behaviour;
 
     font-size: 16px;
-    color: #000;
+    color: var(--mainForegroundColor);
     padding: 5px 15px;
     border-radius: 0.25rem;
 
     &.active {
       font-weight: $font-semibold;
       background-color: #f0f0f0;
+      color: #000;
     }
   }
 }
@@ -188,6 +189,10 @@ label {
 }
 
 .modal {
+  .modal-content {
+    background-color: var(--mainBackgroundColor);
+  }
+
   .modal-header {
     border-bottom: none;
     margin-bottom: 5px;
@@ -249,7 +254,7 @@ label {
   a {
     @include disable-default-a-behaviour;
 
-    color: #000;
+    color: var(--mainForegroundColor);
   }
 }
 
@@ -259,7 +264,7 @@ ngb-tabset.bootstrap {
     &, & a {
       @include disable-default-a-behaviour;
 
-      color: #000 !important;
+      color: var(--mainForegroundColor) !important;
     }
   }
 }
diff --git a/client/src/sass/include/_mixins.scss b/client/src/sass/include/_mixins.scss
index 765297c87..6e2feb748 100644
--- a/client/src/sass/include/_mixins.scss
+++ b/client/src/sass/include/_mixins.scss
@@ -58,11 +58,15 @@
   display: inline-block;
   height: $button-height;
   width: $width;
-  background: #fff;
+  background: var(--inputColor);
   border: 1px solid #C6C6C6;
   border-radius: 3px;
   padding-left: 15px;
   padding-right: 15px;
+
+  &::placeholder {
+    color: var(--inputPlaceholderColor);
+  }
 }
 
 @mixin peertube-input-group($width) {
@@ -73,6 +77,7 @@
 
   .input-group-text{
     font-size: 14px;
+    color: gray;
   }
 }
 
@@ -87,12 +92,12 @@
 @mixin orange-button {
   &, &:active, &:focus {
     color: #fff;
-    background-color: $orange-color;
+    background-color: var(--mainColor);
   }
 
   &:hover {
     color: #fff;
-    background-color: $orange-hoover-color;
+    background-color: var(--mainHoverColor);
   }
 
   &[disabled], &.disabled {
@@ -181,7 +186,7 @@
   width: $width;
   border-radius: 3px;
   overflow: hidden;
-  background: #fff;
+  background: var(--inputColor);
   position: relative;
   font-size: 15px;
 
@@ -278,7 +283,7 @@
     position: relative;
     width: 18px;
     height: 18px;
-    border: $border-width solid #000;
+    border: $border-width solid var(--mainForegroundColor);
     border-radius: 3px;
     vertical-align: middle;
     cursor: pointer;
@@ -292,14 +297,14 @@
       height: 12px;
       opacity: 0;
       transform: rotate(45deg) scale(0);
-      border-right: 2px solid #fff;
-      border-bottom: 2px solid #fff;
+      border-right: 2px solid var(--mainForegroundColor);
+      border-bottom: 2px solid var(--mainForegroundColor);
     }
   }
 
   &:checked + span {
     border-color: transparent;
-    background: $orange-color;
+    background: var(--mainColor);
     animation: jelly 0.6s ease;
 
     &:after {
@@ -357,7 +362,7 @@
 
 @mixin in-content-small-title {
   text-transform: uppercase;
-  color: $orange-color;
+  color: var(--mainColor);
   font-weight: $font-bold;
   font-size: 13px;
 }
@@ -365,10 +370,10 @@
 @mixin actor-owner {
   @include disable-default-a-behaviour;
 
-  display: block;
+  display: inline-table;
   font-size: 13px;
   margin-top: 4px;
-  color: #000;
+  color: var(--mainForegroundColor);
 
   span:hover {
     opacity: 0.8;
diff --git a/client/src/sass/include/_variables.scss b/client/src/sass/include/_variables.scss
index 7fd178c3b..792a3f9c2 100644
--- a/client/src/sass/include/_variables.scss
+++ b/client/src/sass/include/_variables.scss
@@ -8,8 +8,6 @@ $grey-hoover-color: #EFEFEF;;
 $orange-color: #F1680D;
 $orange-hoover-color: #F97D46;
 
-$black-background: #000;
-$grey-background: #f6f2f2;
 $bg-color: #fff;
 $fg-color: #000;
 
@@ -27,11 +25,14 @@ $header-height: 50px;
 $header-border-color: #e9eff6;
 $search-input-width: 375px;
 
+$menu-background: #000;
 $menu-color: #fff;
 $menu-bottom-color: #C6C6C6;
 $menu-width: 240px;
 $menu-left-padding: 26px;
 
+$sub-menu-color: #F7F7F7;
+
 $footer-height: 30px;
 $footer-margin: 30px;
 
@@ -41,3 +42,40 @@ $video-thumbnail-height: 110px;
 $video-thumbnail-width: 200px;
 
 $theater-bottom-space: 85px;
+
+$input-color: $bg-color;
+$input-placeholder-color: #898989;
+
+/*** theme ***/
+
+body {
+  // now beware node-sass requires interpolation
+  // for css custom properties #{$var}
+  --mainColor: #{$orange-color};
+  --mainHoverColor: #{$orange-hoover-color};
+  --mainBackgroundColor: #{$bg-color};
+  --mainForegroundColor: #{$fg-color};
+  --submenuColor: #{$sub-menu-color};
+  --inputColor: #{$input-color};
+  --inputPlaceholderColor: #{$input-placeholder-color};
+}
+
+/*** map theme ***/
+
+// pass variables into a sass map,
+// to be warned of non-existing variables
+$variables: (
+  --mainColor: var(--mainColor),
+  --mainHoverColor: var(--mainHoverColor),
+  --mainBackgroundColor: var(--mainBackgroundColor),
+  --mainForegroundColor: var(--mainForegroundColor),
+  --submenuColor: var(--submenuColor),
+  --inputColor: var(--inputColor),
+  --inputPlaceholderColor: var(--inputPlaceholderColor)
+);
+
+/*** theme helper ***/
+
+@function var($variable) {
+  @return map-get($variables, $variable);
+}
diff --git a/client/src/sass/primeng-custom.scss b/client/src/sass/primeng-custom.scss
index 1ec5c7da2..a998652d5 100644
--- a/client/src/sass/primeng-custom.scss
+++ b/client/src/sass/primeng-custom.scss
@@ -167,7 +167,7 @@ p-table {
           &.ui-state-active {
             &, &:hover, &:active, &:focus {
               color: #fff !important;
-              background-color: $orange-color !important;
+              background-color: var(--mainColor) !important;
             }
           }
         }